*{
				margin: 0;
				padding: 0;
				list-style: none;
			}
			header{
				width: 100%;
				height: 50px;
				background: #272b37;
			}
			header img{
				width: 120px;
				height: 40px;
				margin-left: 360px;
				margin-top: 5px;
				float: left;
			}
			header ul li{
				float: left;
				color: white;
				font-family: "黑体";
				font-size: 18px;
				text-align: center;
				margin-left: 20px;
				width: 100px;
				line-height: 50px;
			}
			header ul li a{
				float: left;
				color: white;
				font-family: "黑体";
				font-size: 18px;
				text-align: center;
				/*margin-left: 20px;*/
				width: 100px;
				line-height: 50px;
				text-decoration: none;
			}
			header ul li a:hover{
				color: #272b37;
				background: white;
			}
			header ul li:hover{
				color: #272b37;
				background: white;
			}
			#lr{
				float: right;
				margin-right: 350px;
			}
			#lr a{
				float: left;
				line-height: 50px;
				color: white;
				font-family: "黑体";
				font-size: 18px;
				margin-right: 10px;
				text-decoration: none;
			}
			#lr p{
				float: left;
				line-height: 50px;
				color: white;
				font-family: "黑体";
				font-size: 18px;
				margin-right: 10px;
				text-decoration: none;
			}
			#lr a:hover{
				color: yellow;
			}
			#introduce{
				width: 1200px;
				height: 300px;
				margin-top: 540px;
				margin-left:240px ;
				/*border: 1px solid black;*/
				box-sizing: border-box;
			}
			#introduce img{
				width: 300px;
				height: 300px;
				float: left;
			}
			#introduce p{
				color: #272b37;
				font-family: "黑体";
				font-size: 18px;
				line-height: 40px;
				padding-top: 40px;
			}
			footer{
				width: 100%;
				height: 70px;
				background: #272b37;
				box-sizing: border-box;
			}
			footer p{
				color: white;
				font-size: 14px;
				text-align: center;
				padding-top: 25px;
			}